Simultaneity of foetal heart rate acceleration and foetal trunk movement determined by foetal magnetocardiogram actocardiography
Simultaneity of foetal heart rate acceleration and foetal trunk movement determined by foetal magnetocardiogram actocardiography
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DOI：
10.1088/0031-9155/47/5/310
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发表时间：
2002-03-07
影响因子：
3.5
通讯作者：
Wakai, RT
中科院分区：
文献类型：
--
作者：
Zhao, H;Wakai, RT
我们描述了一种新的心搏图方法，胎儿心磁图（fMCG）心搏图，这是基于胎儿躯干运动的fMCG的高灵敏度。我们证明了该方法的有效性，通过应用它来评估胎儿心率（FHR）加速度和胎儿躯干运动的开始时间。该分析仅限于可以准确确定FHR加速和胎儿运动开始的事件，即FHR稳定且接近加速前的平均静止水平。我们发现，胎心率加速几乎总是与胎动同时发生或先于胎动。这比基于其他技术的先前研究更有力地支持了协调控制胎心率加速度和胎动的假设。我们还发现，胎心率变异性往往在胎心率加速开始时或接近开始时降低，这种情况是胎动开始的准确标志，即使胎动开始滞后于胎心率加速。
We describe a new method of actocardiography, foetal magnetocardiogram (fMCG) actocardiography, which is based on the high sensitivity of the fMCG to foetal trunk movements. We demonstrate the efficacy of the method by applying it to assess the simultaneity of onset of foetal heart rate (FHR) acceleration and foetal trunk movement. The analysis was restricted to events for which the onset of FHR accelerations and foetal movements could be determined accurately, i.e. when FHR was stable and near the average quiescent level just prior to the acceleration. We found that FHR accelerations coincided with or preceded foetal movements nearly all the time. This supports the hypothesis of coordinated control of FHR accelerations and foetal movements more strongly than prior studies, based on other techniques. We also found that beat-to-beat FHR variability often decreased at or near the start of FHR accelerations and that this occurrence was an accurate marker of foetal movement onset, even when foetal movement onset lagged FHR accelerations.